/// <summary>
/// Obtains an access token given an authorization code and callback URL.
/// </summary>
/// <param name="returnUrl">
/// The return url.
/// </param>
/// <param name="authorizationCode">
/// The authorization code.
/// </param>
/// <returns>
/// The access token.
/// </returns>
protected override string QueryAccessToken(Uri returnUrl, string authorizationCode)
{
// Note: Facebook doesn't like us to url-encode the redirect_uri value
var builder = new UriBuilder(TokenEndpoint);
builder.AppendQueryArgs(
new Dictionary <string, string> {
{ "client_id", _appId },
{ "redirect_uri", NormalizeHexEncoding(returnUrl.AbsoluteUri) },
{ "client_secret", _appSecret },
{ "code", authorizationCode },
{ "scope", "" },
});
using (var client = new WebClient())
{
string data = client.DownloadString(builder.Uri);
if (string.IsNullOrEmpty(data))
{
return(null);
}
_accessTokenResponse = JsonConvert.DeserializeObject <VkAccessTokenResponse>(data);
if (_accessTokenResponse != null)
{
return(_accessTokenResponse.access_token);
}
return(string.Empty);
}
}
/// <summary>
/// Obtains an access token given an authorization code and callback URL.
/// </summary>
/// <param name="returnUrl">
/// The return url.
/// </param>
/// <param name="authorizationCode">
/// The authorization code.
/// </param>
/// <returns>
/// The access token.
/// </returns>
protected override string QueryAccessToken(Uri returnUrl, string authorizationCode)
{
// Note: Facebook doesn't like us to url-encode the redirect_uri value
var builder = new UriBuilder(TokenEndpoint);
builder.AppendQueryArgs(
new Dictionary<string, string> {
{ "client_id", _appId },
{ "redirect_uri", NormalizeHexEncoding(returnUrl.AbsoluteUri) },
{ "client_secret", _appSecret },
{ "code", authorizationCode },
{ "scope", "" },
});
using (var client = new WebClient())
{
string data = client.DownloadString(builder.Uri);
if (string.IsNullOrEmpty(data))
{
return null;
}
_accessTokenResponse = JsonConvert.DeserializeObject<VkAccessTokenResponse>(data);
if (_accessTokenResponse != null)
{
return _accessTokenResponse.access_token;
}
return string.Empty;
}
}
